Angel feigned surprise at Katara's exclamation about him being injured, looking down and reacting as if it were the first time he'd glimpsed upon the wound. "Oh, so I am. It's nothing to get wor--"
She told him to sit, using a voice and giving him a look that reminded him of the way in which Cordelia would usually handle a this situation. And to think that at the moment, he was powerless to do anything to try and save her. It seemed that whenever things were starting to go right between the two of them, something happened to pull them apart.
Reluctantly, he sat on her cot, taking note of the bandage on her neck. He sniffed the air, out of pure habit, and screwed his face up into one of his more serious, slightly angered, expressions.
Looking to Katara pointedly, he stated: "Someone bit you."